Clean Dune Index (CDI) for evaluation of the Bulgarian Black Sea coastal dunes with an additional class of Exceedingly dirty dunes.

 
 
  Part of: Prodanov B, Bekova R (2023) A baseline assessment of anthropogenic macrolitter on dunes along the Bulgarian Black Sea Coast using visual census and Unmanned Aerial Systems. Nature Conservation 54: 13-54. https://doi.org/10.3897/natureconservation.54.111350